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IMPROVED ROOFING-CEMENT.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, R. H. FITTS, of Lawrence, in the county of- Douglas, and State of Kansas, have invented a. new and useful Cement for Roofing, which I call Rock-Paste; and I do hereby declare that the following is a full and exact description of the preparation and application of the same.

The ingredients entering into and composing my roofing-cement are, coal tar, eight gallons; pulverized soapstone, ninety pounds; air-slaked lime, ten pounds; salt, two pounds. These ingredients may be mixed either cold or h'ot, and thoroughly incorporated by stirring; and after standing for two or three days, so as to become thoroughly blended, the composition will be ready for use. i

For coating shingles previous to their being employed for roofing, the composition may be composed of, coal tar, twelve gallons; pulverized soapstone, fifty pounds; air-slaked' lime, twenty poundsj salt, five pounds.

My composition may be applied either cold or hot;but when used for coatingshingles previous to their being used for roofing, it should be heated and the shingles dipped into it, after which they should be allowed to dry in the open air. Y

' This composition, after being applied and exposed to the atmosphere, dries andbecomes hard and impervious to water .or dampness, and is not afi'ected by heat or cold. Itmay be applied -to felt for roofing in the ordinary manner, or to any other kind of a roof. It is also useful for making tight floors, by cementing the joints'ofthe boards asthey are put together-{audit may also be applied as a concrete for building walls, &c.

On account of its clieapness and the simplicity of the process by which it is prepared, together with its durability, it is unsurpassed for the purposes specified.

WhatI claim as my invention, and desire to secure by Letters Patent, is

The composition,substantially as described and for the purposes set forth.'

The above specification signed by'nie, this'l-lth dayof January, 1867;

R. H. FITTS.

Witnesses:

E. S. SCUDDER, E. D. Lsnnl 

